in the united states. >> the hearing this morning created more confusion over the fbi's handling of tamerlan tsarnaev in 2011 and which federal agency new about his trip the following 'er to russia. >> was your department aware of his travels to russia, and if you weren't, the reason. >> the travel in 2012 you're referring to, yes, the system pinged when he was leaving the united states. by the time he returned, all investigations had been -- the matter had been closed. >> but napolitano's statements chronic with what assistant fbi briefed another lawmaker who is a member of the judiciary committee. >> the fbi told me they had no knowledge of him leaving or coming back. the name was misspelled so i would like to talk to you more about this case. how this man left. where he went, and when we say there was no broader plot here, i don't know how in the world we know that at this early stage. reporter: napolitano testifying the system that flags border agents to individuals under investigation, like tamerlan tsarnaev, was no longer valid and expired by the time the 26-year-old returned from russ